Home / 10,989.30-16,475.85-4,744.20

Finding the Fourth Proportional to 10,989.30, 16,475.85 and 4,744.20

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Solution

The fourth proportional to 10,989.30, 16,475.85 and 4,744.20 is: 7,112.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,989.30 : 16,475.85 = 4,744.20 : x
  2. Step 2: Convert to fraction form
    10,989.30/16,475.85 = 4,744.20/x
  3. Step 3: Cross multiply
    10,989.30x = 16,475.85 × 4,744.20
  4. Step 4: Simplify right side
    10,989.30x = 78,164,727.57
  5. Step 5: Solve for x
    x = 78,164,727.57/10,989.30
  6. Step 6: Final answer
    x = 7,112.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.